[INFO] crate tuple 0.4.2 is already in cache
[INFO] extracting crate tuple 0.4.2 into work/ex/clippy-test-run/sources/stable/reg/tuple/0.4.2
[INFO] extracting crate tuple 0.4.2 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/tuple/0.4.2
[INFO] validating manifest of tuple-0.4.2 on toolchain stable
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of tuple-0.4.2 on toolchain stable+rustflags=-Dclippy::into_iter_on_array
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing tuple-0.4.2
[INFO] finished frobbing tuple-0.4.2
[INFO] frobbed toml for tuple-0.4.2 written to work/ex/clippy-test-run/sources/stable/reg/tuple/0.4.2/Cargo.toml
[INFO] started frobbing tuple-0.4.2
[INFO] finished frobbing tuple-0.4.2
[INFO] frobbed toml for tuple-0.4.2 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/tuple/0.4.2/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] linting tuple-0.4.2 against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-2/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/reg/tuple/0.4.2:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+stable" "clippy" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 7ba98a900fd891f4ec7b0e7a3a2c988e40ef3c6fa10abaee82356c2b08656342
[INFO] running `"docker" "start" "-a" "7ba98a900fd891f4ec7b0e7a3a2c988e40ef3c6fa10abaee82356c2b08656342"`
[INFO] [stderr]     Checking tuple v0.4.2 (/opt/crater/workdir)
[INFO] [stderr] warning: redundant pattern matching, consider using `is_some()`
[INFO] [stderr]    --> src/lib.rs:272:16
[INFO] [stderr]     |
[INFO] [stderr] 272 |           if let Some(_) = t {
[INFO] [stderr]     |  _________-      ^^^^^^^
[INFO] [stderr] 273 | |             self.index += 1;
[INFO] [stderr] 274 | |         }
[INFO] [stderr]     | |_________- help: try this: `if t.is_some()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::redundant_pattern_matching)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching
[INFO] [stderr] 
[INFO] [stderr] warning: redundant pattern matching, consider using `is_some()`
[INFO] [stderr]    --> src/lib.rs:272:16
[INFO] [stderr]     |
[INFO] [stderr] 272 |           if let Some(_) = t {
[INFO] [stderr]     |  _________-      ^^^^^^^
[INFO] [stderr] 273 | |             self.index += 1;
[INFO] [stderr] 274 | |         }
[INFO] [stderr]     | |_________- help: try this: `if t.is_some()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::redundant_pattern_matching)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.06s
[INFO] running `"docker" "inspect" "7ba98a900fd891f4ec7b0e7a3a2c988e40ef3c6fa10abaee82356c2b08656342"`
[INFO] running `"docker" "rm" "-f" "7ba98a900fd891f4ec7b0e7a3a2c988e40ef3c6fa10abaee82356c2b08656342"`
[INFO] [stdout] 7ba98a900fd891f4ec7b0e7a3a2c988e40ef3c6fa10abaee82356c2b08656342